FR2493666A1 - SUPPORT FOR ELECTROTECHNICAL COMPONENTS - Google Patents

Abstract

1.SUPPORT FOR ELECTROTECHNICAL COMPONENTS. 2. THE ESSENTIAL ELEMENT OF THIS BRACKET IS A CLAMP PART WHICH IS PRESSED INTO AN OPENING IN A MOUNTING SURFACE SO THAT A PORTION OF THE SAID PART ENTERS A SPACE BEHIND THE SAID OPENING; THIS CLAMPING PART IS MADE IN THE FORM OF AN ELASTIC COLLAR 6 WITH SEVERAL SPRINGS 8 OF DIFFERENT LENGTHS WITH ONE OF THEIR LARGE SIDES 10 CURVED OUTWARDS, ON THEIR FRONTAL SIDE AN INCLINED SIDE 7, THE OTHER LARGE SIDE 11 , ASSOCIATED WITH THE POINT THE PLUSELEVE OF EACH SPRING 8 BEING AROUND PARALLEL TO THE GENERATORS OF THE SAID CYLINDRICAL SURFACE. 3. THE SUPPORT IS SPECIFICALLY INTENDED FOR FIXING INDICATOR LIGHTS AND FUSES.

Description

The present invention relates to a support for

  electrotechnical components, the attachment of which is

  sée by simple depression in a opening

  in a mounting plate, consisting of a housing

  carrying an essentially cylindrical outer surface (4) provided, if appropriate, with a surface with a part

  in relief or a longitudinal rib intended to receive

  see an elastic clamping piece (6) whose diameter

  exceeds for part of its length the diameter of the

  said opening, each face penetrating the space in

  the opening being oblique to the general

  of the cylindrical outer surface.

  Supports of this type have been known for a long time.

  time, they serve, for example, to receive

  less or fuses. In addition, the same type of fastening has already been proposed for cable feedthroughs across

  a partition wall (G.B. Patent No. 1,128,227).

  For these supports or the cable crossing pre-

  cited, the fixation is based on the following principle: an elastic piece of clamping adapts temporarily, when

  its introduction into the opening, by elastic deformation

  than the smaller inner diameter of the opening and widens again afterwards, after passing through the opening, into the space behind the

  corresponding mounting. A side arranged obliquely

  then in the space behind the surface of

  the portion of the clamping piece between the obli-

  that and the back edge of the opening depending on the thickness

  of said mounting surface. In the case of fluc-

  variations in the thickness of the mounting surface are not to be feared, it may be provided, instead of the oblique face, steps forming a staircase, so that

  for each thickness of the mounting surface one or more

  predetermined stadia enter the space in

  back of the corresponding opening.

  As a material for the elastic clamping piece, it is possible to envisage the base material of the support, for example a relatively hard-and-tough electrically insulating plastic material, but it has already been proposed to produce the elastic clamping piece

  than sheet spring (German Patent DE-OS 26 40 951).

  Given the greater hardness and easier machining,

  the use of spring sheet has been generally adopted.

  Regardless of the choice of material,

  known ports, because of their way of

a specific disadvantage.

  For the stepped realization of the clamping piece penetrating into the space behind the mounting surface, one arrives each time only to a final embodiment which certainly prevents a sliding of the support to the outside of the mounting surface but does not ensure a

  set up so to speak fixed inside the-

  Verture. If against the portion penetrating into the rear space of the clamping piece has an obliquely oriented face, then the inclination of the oblique face in

  the aim of covering the usual range of thicknesses of the

  mounting face may be weak. This has as consequences,

  especially in the case of relatively small openings

  and thick mounting plates, that the penetration into the rear space is only imperfectly achieved, this

  where there is a risk that the support may slip accidentally

  so much again from the opening to the outside, as soon

  that a minimal tensile force is applied. Another

  of the small inclination of the oblique face con-

  in that the effect of the penetration is only manifested by an additional movement of the support, obliquely to its longitudinal axis, therefore, after

  the depression of the support, a flickering movement

  plicated to the support is still necessary to sit the

  penetration into the rear space.

  The subject of the invention is therefore a support of the type mentioned in the preamble, which already guarantees a fixed attitude for appreciable variations in the value of the

  thickness of the mounting plate, only by the opera-

penetration.

  The invention consists in that the clamping piece is made in the form of an elastic collar with a multiplicity of springs of different lengths,

  with one of their lateral faces curved towards the outside

  the inclined face is on the front side, and that in each case the other side face

  at the highest point of each spring is almost paral-

lle to the generators.

  There exists on the support according to the invention a large number of separate springs which are, so to speak,

  all twisted on themselves. A group is formed by this means.

  pe of springs which allows a particular inclination

  strong of the penetrating face in the space behind the opening. The inclination with respect to the generators

  of the outer cylindrical surface can be, for example

ple, of 450.

  Because of the outward-facing prestressing

  In each case, each spring makes a very good centering, particularly for openings having a large spike; on the other hand, the strong inclination of all the springs entering the space at the rear favors a

  important springback, so that

  satisfactory of the spring is obtained, after the depression,

  only by virtue of the effect of elastic enlargement

than.

  Because of this very satisfactory maintenance of the

  port according to the invention, by virtue of the high inclination of

  the oblique face penetrating into the space behind the

  it is advantageous to adjust the length of the

  separate spells in such a way that in the use case

  standard mounting plates, at least one spring

  with its oblique face in the space behind the aperture. To guarantee these conditions even in the case

  large variations in the value of the thickness of the

  standardized mounting methods, it is proposed, according to a

  additional feature of the invention, that the springs are grouped into groups with, each in the transverse direction, a length in the prestressed state which decreases and the highest point of the smallest spring of each group is located higher than the point

  the lowest of the next largest spring. From this

  However, it is certain that at least one spring of each group only partially enters the rear space of

  the corresponding opening of the mounting plate and

  thus, with the help of the strong inclination, a good tightening effect. In addition, if three groups are distributed

  on the circumference of the elastic collar, we arrive at a fixa-

  in three points, which should be considered as

  advantageously for reasons falling within the scope of

  tick. It is possible for the first time to cover,

  with the aid of the invention, a particularly wide range

  due to mounting plates. For nominal thicknesses of 0.75; 1.00; 1, 20; 1.50; 1.80; 2.20; 2.50; and 3.00 mm, four springs inside a group are sufficient, each spring covering two thicknesses of the mounting plate. Since the difference in dimensions between two adjacent nominal thicknesses varies in approximately the same direction as these thicknesses, it is advantageous to choose the inclination of the oblique face penetrating into the rear space of the considered opening. more

  great that the length of the spring is small. As a result

  while the longer spring is inclined, for example, 400 relative to the plane of the support collar, the shortest spring has an inclination of 550 per

example.

  The invention will be described in more detail in

  annexed drawing by way of example, which is by no means

  tif and on which: - Figure 1 is a side view of the support according to the invention, shown enlarged;

  FIG. 2 is a plan view of a

  jection developed elastic collar according to the embodiment of Figure 1; FIG. 3 is a side view of the support with a surface comprising a portion in relief and without the elastic collar; and Za is a plan view of another embodiment of the elastic collar, similar to FIG.

Figure 2.

  The support 1 shown in FIG.

  with a shank 2 forward in the opening of a

  than mounting, until the underside of a

  collar 3 is applied against the surface of the plate of

  floor (not shown). A collar 5 following

  the rod 2 is incorporated; an outer surface of 4

  substantially cylindrical extends between one side thereof and the underside of the collar 3. It serves to receive a

  elastic collar 6 which surrounds the outer surface 4 es-

  senselessly without play between the collar 5 and the collar 3. The elastic collar 6 is constituted by three groups of each four separate springs 8 which have in

  the circumferential direction a length in the con-

  ran continuously decreasing. An oblique side 7 is disposed at the free upper end of each spring, which is oriented obliquely downward at an angle with the generatrices of the outer surface and

  which, in addition, is directed outwards. From this

  each spring 8 has an uppermost point 12 and a lowest point 13, the position spaced from point 13 being made by bending the associated long side 10 away from the outer surface 4. The other large side 11 associated with the highest point 12 is roughly oriented

  parallel to the generators of the outer surface 4.

  In the exemplary embodiment shown, the highest point 12 of each smallest spring 8 is higher than the lowest point of the neighboring spring.

  longer. If, for example, the mounting plate has a thick

  d, the rear face of the associated opening is then grasped at the rear, to receive the support 1, by the middle springs to the right as well as to the left of each group, while the longest spring does not reach not the back side of the opening and that the most

  small does not come into contact with the opening at all.

  ture. By virtue of the fact that the spring sections the

  lie on the sides turned towards each other, it avoids producing only a final embodiment in the form of a spring penetrating entirely in the space behind the rear face of the opening; on the contrary, in

  each case the lower portion of the oblique side 7 of the

  the 8 longest neighbor also participates in fixing

  following the penetration into the rear space.

  It is ensured by this means that the support 1 is maintained not only by a mechanical control but always by

  a positive control in the axial direction to the inte-

  the corresponding opening of the mounting plate

ge.

  Each time there is a gap, for example

  in the form of a cut-out, between the separate springs

  8, and this guarantees the mobility of said springs 8 and therefore the operational safety during the process of penetration into the space behind the

  the opening. Moreover, the cuts can be prolonged

  with the slots 9, which makes the springs 8 more flexible overall.

  for appropriate application, springs with a

  feature of "hard" elasticity, we do not spare

  slots 9 in the extension of the cutouts.

  2 shows the development of an elastic collar 8. It contains three groups of four or five (in all thirteen) springs 8, their distribution being chosen so that each time long springs 8 are on the outer edges . This development can be carried out for example in the form of a cut piece, followed by an opening of the springs 8 and a deformation in order to obtain a roughly annular element, which is then pushed from the bottom. , by

  through the flange 5, on the support,

  3, then it must be ensured that the two long lateral springs 8 are placed directly next to a surface 14 having a portion in relief, whose level projecting from the cylindrical outer surface 4 serves to protect the

  elastic collar 6 against a torsion with respect to

  port 1. It is also possible to incorporate, in place of

  this 14 having a raised portion, a heel oriented

  in the direction of the length of the support 1; these two

  my achievements serve to protect the support 1, in

  whole in an aperture of a form appropriate to the

  the mounting plate, against twisting.

  Figure 4 represents another example of

  collar 6 'according to the invention. On this occasion, the longest springs of a group are provided with

  each time, instead of an oblique side 7, of a surface

  this terminal 7 ', which is perpendicular to the long sides and 11 considered. The length of the associated springs 8 'is chosen each time so that they apply without play on the lower surface of the collar 3. In their

  upper part, these springs 8 'are slightly

  outward, so as to provoke, during the

  the support 1 in an opening in a mounting plate, a centering of the support. This centering is an additional measure, since the support, in

  by virtue of the spacing of the lowest points 13

  spells 8 is already the object, already original, a very good

  centering. With this example of realization, it is necessary to

  To ensure that the mounting plate has a thickness at least equal to about the distance from the end plate 7 'in the middle of the oblique side 7 of the spring 8' immediately

bigger than the smallest.

  Experience has shown that a satisfactory action of the springs 8 is obtained each time among others

  by virtue of their weak expansion in the circumferential direction

  of the cylindrical outer surface 4 and the relatively large spacing of the most

  low. More precisely, spacing angles have approximately

  up to 450 can be reached; they are me-

  in Figure 1, between the upper part of the

  spring 8 and the tangent to the location of the

  associated emitter of the outer surface 4, therefore

  such as the generator which is

  near the long side 11 of the associated spring. Because of

  the weakness of the dilation in the circum-

  the spring 8 is forced back, when the

  support 1 in an opening of only one

  small quantity from the surface of this opening.

  ture, so that it is again heavily loaded elastically

  tically, without plastic deformation, after the

  the back of the opening. The thickness of the spring may be between 0.5 and 1 mm, but

  can be chosen lower or, also, larger.

  It goes without saying that the present invention has been described only as an indication and not limiting and that it is capable of various variants without departing from its scope. -9

Claims (8)

  1.- Support for electrotechnical components whose fixing is carried out by simply driving into   an opening in a mounting plate, constituting   killed by a casing with an outer surface es-   sensitively cylindrical with, if necessary, a sur-   face having a raised portion or a long groove   the longitudinal axis intended to receive an elastic clamping   the diameter of which exceeds a part of its length.   the inside diameter of said opening, each face entering the space behind the opening being oblique with respect to the generatrices of the surface   cylindrical outer member, characterized in that said piece   this tightening is carried out in the form of an elastic collar.   tick (6) with several springs (8) of different lengths.   with one of their long curved sides (10) facing outwards, having on their end face the inclined side (7), and in that each time the other large side (11) associated with the highest point of each spring (8)   is roughly parallel to the generators.   2. Support according to claim 1, characterized   risé in that the springs (8, are rasseniblés in groups, each time with a prestressing length decreasing in the transverse direction and in that the point plus   of each spring (8) the smallest is   above the lowest point of the neighboring spring (8) which is bigger.   3.- Support according to one of claims 1 and   2, characterized in that each group is constituted by four or five springs (8).   4.- Support according to one of claims 2 and   3, characterized in that in total three groups are incor-   pores in the elastic collar (6).   5. Support according to any of the claims   cations 1 to 4, characterized in that the longer springs (8 ') each have on their front face, - 10 -   instead of the oblique side, an end surface (7 ') oriented perpendicular to the long sides (10, 11) of these springs.   6. Support according to any of the claims   1 to 5, characterized in that the long sides (10, 11) of the neighboring springs (8) are at a distance one from the other.   7.- Support according to any one of the   1 to 6, characterized in that the inclination of the side   oblique (7) increases when the length in the precon- traint decreases.   8.- Support according to any of the claims   1 to 7, characterized in that the spacing angle (a) between the upper part of each spring (8) and the tangent to the associated generator reaches a maximum of About 450.